If I want the icon to be centered on the page in both desktop on mobile versions what CSS variants need to be changed?Right now with this code:
.scrollup { width: 40px; height: 40px; opacity: 0.9; bottom: 25px; left: px; position: fixed; z-index:100; display: none; background: url('http://static.squarespace.com/static/53e29465e4b09d387c666792/t/541f7527e4b02b592c3dbdfd/1411347751880/scrollarrow.png') no-repeat;}
It appears somewhat centered but slightly off to the right?